[interface configuration] Try to avoid losing address info after shutdown.

2006-05-21 Andrew J. Schorr <ajschorr@alumni.princeton.edu>

	* if.h: (struct connected) Document the meaning of the
	  ZEBRA_IFC_REAL and ZEBRA_IFC_CONFIGURED flags.
	* connected.c: (connected_withdraw) Do not delete the connected
	  address if the ZEBRA_IFC_CONFIGURED flag is set.
	  (connected_add_ipv4,connected_add_ipv6) Before calling
	  connected_withdraw, unset the ZEBRA_IFC_CONFIGURED flag
	  on the superseded connected structure.

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/if.h b/lib/if.h
index 20df7ef16..0a4ff14da 100644
--- a/lib/if.h
+++ b/lib/if.h
@@ -145,6 +145,12 @@ struct connected
   u_char conf;
 #define ZEBRA_IFC_REAL         (1 << 0)
 #define ZEBRA_IFC_CONFIGURED   (1 << 1)
+  /*
+     The ZEBRA_IFC_REAL flag should be set if and only if this address
+     exists in the kernel.
+     The ZEBRA_IFC_CONFIGURED flag should be set if and only if this address
+     was configured by the user from inside quagga.
+   */
 
   /* Flags for connected address. */
   u_char flags;